Jiangxi University of Science and Technology

About: Jiangxi University of Science and Technology is a education organization based out in Ganzhou, China. It is known for research contribution in the topics: Microstructure & Alloy. The organization has 6958 authors who have published 5576 publications receiving 50650 citations.

Perovskite solar cells based on bottom-fused TiO2 nanocones

Abstract: Compared to the fast electron transport in perovskite and rapid electron injection from perovskite to TiO2 nanoparticle scaffold, the slower electron transport rate in mesoporous TiO2 is reported to be a hindrance factor for power conversion efficiency. One-dimensional nanomaterials are believed to show faster carrier transport rate. In this paper, vertically aligned one-dimensional TiO2 nanocones on transparent conducting oxide were synthesized and utilized as a promising scaffold for perovskite solar cells. A simple concentration-dependent CH3NH3PbI3 seeding spin-coating method was developed to effectively improve the surface coverage at low cost. The resultant perovskite solar cells realized an average power conversion efficiency up to 11%, which is higher than that of rectangular TiO2 nanorods-based device. Besides the faster electron transport rate and slower recombination in such one-dimensional nanostructures, we attribute the superior performance of the nanocone-based device to the fact TiO2 nanocone arrays allow more CH3NH3PbI3 to deposit. By scaling up the nanocone-based devices to 1.2 cm2, they yielded a decent average power conversion efficiency of ∼6%. The combination of TiO2 nanocones with perovskite paves a way to take full advantage of one-dimensional nanomaterials and organic–inorganic perovskites for photovoltaic applications.

Sulfur-Doped TiO2 Anchored on a Large-Area Carbon Sheet as a High-Performance Anode for Sodium-Ion Battery.

Abstract: Well-tailored sulfur-doped anatase titanium dioxide nanoparticles anchored on a large-area carbon sheet are designed, where the in situ sulfur-doped titanium dioxide directly comes from titanium oxysulfate and the large-area carbon sheet is derived from glucose. When applied as an anode material for sodium-ion batteries, it exhibits an excellent electrochemical performance including a high capacity [256.4 mA h g-1 at 2 C (1 C = 335 mA h g-1) after 500 cycles] and a remarkable rate of cycling stability (100.5 mA h g-1 at 30 C after 500 cycles). These outstanding sodium storage behaviors are ascribed to the nanosized particles (about 8-12 nm), good electronic conductivity promoted by the incorporation of carbon sheet and sulfur, as well as the unique chemical bond based on the electrostatic interaction.